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Service bulletins for the 2021 Chevrolet Tahoe

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1477 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Bulletins, newest first
20-NA-1662025-01-23. Service bulletin. ENGINE. This service bulletin advises the technician of possible coolant entering the areas of the engine, either through failed parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.
09-06-04-026Z2025-01-23. Service bulletin. ENGINE; POWER TRAIN; ELECTRICAL SYSTEM. This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
24-NA-0732025-01-23. Service bulletin. SERVICE BRAKES. This technical bulletin provides a procedure to inform drivers that under certain driving conditions such as hilly or mountainous roads accompanied with frequent braking, that the original equipment front brake pads may wear prematurely.
22-NA-2182025-01-23. Service bulletin. ENGINE. This informational bulletin advises the technician on normal noises produced by the engine and to explain this to the customer.
PIT5854C2025-01-20. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates information on vehicle speed being limited due to aftermarket lower kit being installed on the vehicle.
PIT5832T2025-01-20. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication configuration did not complete correctly.
PIP6008B2025-01-20. Service bulletin. POWER TRAIN. This Preliminary information communicates a possible retainer ring dis-lodged for a DTC P2714, may not have reverse as well.
07-00-89-037U2025-01-18. Service bulletin. UNKNOWN OR OTHER. This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance programs.
20-NA-1322025-01-18. Service bulletin. ELECTRICAL SYSTEM. This warranty administration bulletin provides policy information on the requirements for 12V battery testing and warranty replacements.
21-NA-0912025-01-17. Service bulletin. UNKNOWN OR OTHER. This service bulletin provides information for customers/dealers/technicians on Normal Camera Display Operation - Flashing Diamond - Spot - or UFO like image on Camera Display.
22-NA-2492025-01-15. Service bulletin. ELECTRICAL SYSTEM. This technical bulletin provides a procedure to locate and repair the accessory wire if found that the terminal has come out of the connector.
21-NA-0282025-01-15. Service bulletin. POWER TRAIN. This technical bulletin provides a procedure to replace the rear diff fluid to correct the rear clutches from chattering, which create a moan type noise.
24-NA-1392025-01-09. Service bulletin. ELECTRICAL SYSTEM; FUEL/PROPULSION SYSTEM; ENGINE. This service bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Malfunction Indicator Lamp (MIL) Illuminated – DTC P023F or P129F Set.
18-NA-2632025-01-09. Service bulletin. UNKNOWN OR OTHER. This warranty administration bulletin provide policy information for variable diagnostic time allowances on select labor operations (U.S. Only).
PIT6134F2025-01-03. Service bulletin. SERVICE BRAKES. This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining material.
23-NA-0642025-01-03. Service bulletin. ELECTRICAL SYSTEM. This service bulletin provides information on the Transport Mode Feature, also known as Logistics mode, which is used to increase the 12V Battery stand time of the vehicle during transit and or long period of stand time at the dealerships.
24-NA-2642024-12-20. Service bulletin. POWER TRAIN. This bulletin helps aid the tech in possible transmission noise that may be normal or abnormal depending on the concern noted.
PIT6265B2024-12-20. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealership technicians that if they encounter a vehicle with this issue, they can contact TCSC to have the software for the MDI backdated to communicate properly.
22-NA-2382024-12-19. Service bulletin. UNKNOWN OR OTHER; ELECTRICAL SYSTEM. This service bulletin provides diagnostic/repair information to correct a customer concern of Cellphone not Charging or USB Receptacle Inoperative.
21-NA-2752024-12-19. Service bulletin. POWER TRAIN; WHEELS; AIR BAGS. This service bulletin provides repair information to correct customer concerns of Wheel Lock Up, ABS Event, Loud Bang and a Flashing “D” on Driver Information Center (DIC) when Lightly or Moderately Accelerating Forcing an 8-7 or 8-6 Downshift.
17-NA-2712024-12-19. Service bulletin. WHEELS; SERVICE BRAKES. This service bulletin provides a procedure to clean the back side of the rims and rotors and to correct the customer concern of wheel clicking.
08-07-30-035I2024-12-19. Service bulletin. POWER TRAIN. This service bulletin provides information on the harmful effects of ethylene glycol in transmission fluid.
22-NA-1682024-12-18. Service bulletin. ENGINE. This bulletin provides diagnostic information when checking the exhaust system for leaks.
19-NA-2192024-12-17. Service bulletin. ENGINE. This diagnostic tip bulletin provides additional information on how to diagnose a possible valve, lifter or camshaft issue.
PIT6144C2024-12-17. Service bulletin. SUSPENSION. This Preliminary information communicates A diagnostic tip from root causing DTC: C1197 caused by a pinched air inlet hose to the suspension compressor air leveling system.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.